| John of Brienne | |
|---|---|
 Coronation of John and his first wife,Maria (from a 13th-century miniature) | |
| Latin Emperor of Constantinople | |
| Reign | 1229–1237 (also regent forBaldwin II) |
| Coronation | 1231 |
| Predecessor | Baldwin II |
| Successor | Baldwin II |
| Co-ruler | Baldwin II |
| King of Jerusalem | |
| Reign | 1210–1225 (also regent forIsabella II from 1212) |
| Coronation | 3 October 1210 |
| Predecessor | Maria |
| Successor | Isabella II andFrederick |
| Co-rulers |
|
| Count of Brienne | |
| Reign | 1205/06–1221 |
| Predecessor | Walter III |
| Successor | Walter IV |
| Born | c. 1170 |
| Died | 19–23 March 1237 (aged 66–67) Constantinople |
| Burial | Hagia Sophia, Constantinople (nowIstanbul, Turkey) |
| Spouses | |
| Issue | |
| House | Brienne |
| Father | Érard II, Count of Brienne |
| Mother | Agnes of Montfaucon |
John of Brienne (c. 1170 – 19–23 March 1237), also known asJohn I, wasKing of Jerusalem from 1210 to 1225 andLatin Emperor of Constantinople from 1229 to 1237. He was the youngest son ofErard II of Brienne, a wealthy nobleman inChampagne. John, originally destined for an ecclesiastical career, became a knight and owned small estates in Champagne around 1200. After the death of his brother,Walter III, he ruled theCounty of Brienne on behalf of his minor nephewWalter IV (who lived in southern Italy).
The barons of theKingdom of Jerusalem proposed that John marry their queen,Maria. With the consent ofPhilip II of France andPope Innocent III, he left France for theHoly Land and married Queen Maria; the couple were crowned in 1210. After Maria's death in 1212 John administered the kingdom asregent for their infant daughterIsabella II; an influential lord,John of Ibelin, attempted to depose him. John of Brienne was a leader of theFifth Crusade. Although his claim of supreme command of the crusader army was never unanimously acknowledged, his right to ruleDamietta (in Egypt) was confirmed shortly after the city fell to the crusaders in 1219. He claimed theArmenian Kingdom of Cilicia on behalf of his second wife,Stephanie, in 1220. After Stephanie and their infant son died that year, John returned to Egypt. The Fifth Crusade ended in failure (including the recovery of Damietta by the Egyptians) in 1221.
John was the first king of Jerusalem to visit Europe (Italy, France, England,León,Castile and Germany) to seek assistance for the Holy Land. He gave his daughter in marriage toHoly Roman Emperor Frederick II in 1225, and Frederick ended John's rule of the Kingdom of Jerusalem. Although the popes tried to persuade Frederick to restore the kingdom to John, the Jerusalemite barons regarded Frederick as their lawful ruler. John administered papal domains in Tuscany, became thepodestà ofPerugia and was a commander ofPope Gregory IX's army during Gregory's war against Frederick in 1228 and 1229.
John was elected emperor in 1229 as the senior co-ruler (withBaldwin II) of theLatin Empire, and was crowned in Constantinople in 1231.John III Vatatzes,Emperor of Nicaea, andIvan Asen II of Bulgaria occupied the last Latin territories inThrace andAsia Minor,besieging Constantinople in early 1235. John directed the defence of his capital during the months-long siege, with the besiegers withdrawing only afterGeoffrey II of Achaea and united fleets from Italian towns defeated their fleet in 1236. The following year, John died as aFranciscan friar.
John was the youngest of the four sons of CountErard II of Brienne and Agnes of Montfaucon.[1][2] He seemed "exceedinglyold ... about 80"[3] to the 14-year-oldGeorge Akropolites in 1231;[4] if Akropolites' estimate was correct, John was born around 1150.[5][6] However, no other 13th-century authors described John as an old man.[5] His father referred to John's brothers as "children" in 1177 and mentioned the tutor of John's oldest brother,Walter III, in 1184; this suggests that John's brothers were born in the late 1160s.[7][8] Modern historians agree that John was born after 1168, probably during the 1170s.[9][10]
Although his father destined John for aclerical career, according to the late-13th-centuryTales of the Minstrel of Reims he "was unwilling".[10] Instead, the minstrel continued, John fled to his maternal uncle at theClairvaux Abbey.[10] Encouraged by his fellows, he became a knight and earned a reputation intournaments and fights.[10] Although elements of theTales of the Minstrel of Reims are apparently invented (for instance, John did not have a maternal uncle in Clairvaux), historian Guy Perry wrote that it may have preserved details of John's life.[11] A church career was not unusual for youngest sons of 12th-century noblemen in France; however, if his father sent John to a monastery he left before reaching the age of taking monastic vows.[11] John "clearly developed the physique that was necessary to fight well" in his youth, because the 13th-century sources Akropolites andSalimbene di Adam emphasize his physical strength.[12]
Erard II joined theThird Crusade and died in theHoly Land in 1191.[13] His oldest son, Walter III, succeeded him in Brienne.[14] John was first mentioned in an 1192 (or 1194) charter issued by his brother, indicating that he was a prominent figure in Walter's court.[5][14] According to a version ofErnoul's chronicle, John participated in a war againstPeter II of Courtenay.[15] Although theTales of the Minstrel of Reims claimed that he was called "John Lackland", according to contemporary charters John heldJessains,Onjon,Trannes and two other villages in theCounty of Champagne around 1200.[14] In 1201,Theobald III granted him additional estates inMâcon,Longsols and elsewhere.[16] Theobald's widow,Blanche of Navarre, persuaded John to sell his estate at Mâcon, saying that it was herdower.[17]
Walter III of Brienne died in June 1205 while fighting in southern Italy.[17] His widow,Elvira of Sicily, gave birth to aposthumous son,Walter IV, who grew up in Italy.[17] John assumed the title ofcount of Brienne, and began administering the county on his nephew's behalf in 1205 or 1206.[18] As a leading vassal of the count of Champagne, John frequented the court of Blanche of Navarre, who ruled Champagne during the minority of her son,Theobald IV.[19] According to a version of Ernoul's chronicle, she loved John "more than any man in the world"; this annoyed KingPhilip II of France.[6][19]
The two versions of Ernoul's chronicle tell different stories about John's ascent to the throne ofJerusalem.[20] According to one version, the leading lords of Jerusalem sent envoys to France in 1208 asking Philip II to select a French nobleman as a husband for their queen,Maria.[6][19] Taking advantage of the opportunity to rid himself of John, Philip II suggested him.[20] In the other version an unnamed knight encouraged the Jerusalemite lords to select John, who accepted their offer with Philip's consent.[20] John visitedPope Innocent III in Rome.[21] The pope donated 40,000 marks for the defence of theHoly Land, stipulating that John could spend the money only with the consent of theLatin patriarch of Jerusalem and thegrand masters of theKnights Templar and theKnights Hospitaller.[22]
John landed atAcre on 13 September 1210;[23] the following day, Patriarch of JerusalemAlbert of Vercelli married him to Queen Maria.[23] John and Maria were crowned in theCathedral of Tyre on 3 October.[23] The truce concluded by Maria's predecessorAimery and theAyyubid sultanAl-Adil I had ended by John's arrival.[24] Although Al-Adil was willing to renew it, Jerusalemite lords did not want to sign a new treaty without John's consent.[23] During John and Maria's coronation, Al-Adil's sonAl-Mu'azzam Isa pillaged the area around Acre but did not attack the city.[23] After returning to Acre, John raided nearby Muslim settlements in retaliation.[25]
Although about 300 French knights accompanied him to the Holy Land,[26] no influential noblemen joined him; they preferred participating in the FrenchAlbigensian Crusade or did not see him as sufficiently eminent.[27] John's cousin,Walter of Montbéliard, joined him only after he was expelled from Cyprus.[27] Montbéliard led a naval expedition to Egypt to plunder theNile Delta.[25] After most of the French crusaders left the Holy Land, John forged a new truce with Al-Adil by the middle of 1211[25][23] and sent envoys to Innocent III urging him to preach a new crusade.[23]
Maria died shortly after giving birth to their daughter,Isabella, in late 1212.[28][29] Her death triggered a legal dispute, withJohn of Ibelin (who administered Jerusalem before John's coronation) questioning the widowed king's right to rule.[28][30] The king sentRaoul of Merencourt,Bishop of Sidon, to Rome for assistance from theHoly See.[31] Innocent III confirmed John as lawful ruler of the Holy Land in early 1213, urging the prelates to support him with ecclesiastical sanctions if needed.[32] Most of the Jerusalemite lords remained loyal to the king, acknowledging his right to administer the kingdom on behalf of his infant daughter;[33] John of Ibelin left the Holy Land and settled in Cyprus.[34]
The relationship between John of Brienne andHugh I of Cyprus was tense.[35] Hugh ordered the imprisonment of John's supporters in Cyprus, releasing them only at Innocent's command.[35] During theWar of the Antiochene Succession John sided withBohemond IV of Antioch and the Templars againstRaymond-Roupen of Antioch andLeo I,King of Cilician Armenia, who were supported by Hugh and the Hospitallers.[35] However, John sent only 50 knights to fight the Armenians in Antiochia in 1213.[36] Leo I concluded a peace treaty with the Knights Templar late that year,[37] and he and John reconciled.[37] John married Leo's oldest daughter,Stephanie (also known as Rita), in 1214[37] and Stephanie received a dowry of 30,000bezants.[38] Quarrels among John, Leo I, Hugh I and Bohemond IV are documented by Innocent III's letters urging them to reconcile their differences before theFifth Crusade reached the Holy Land.[38]
Innocent proclaimed the Fifth Crusade in 1213, with the "liberation of the Holy Land" (the reconquest ofJerusalem) its principal object.[39][40] The first crusader troops, commanded byLeopold VI of Austria, landed at Acre in early September 1217.[41]Andrew II of Hungary and his army followed that month,[41] and Hugh I of Cyprus and Bohemond IV of Antioch soon joined the crusaders.[38][42] However, hundreds of crusaders soon returned to Europe because of a famine following the previous year's poor harvest.[43] A war council was held in the tent of Andrew II, who considered himself the supreme commander of the crusader army.[44] Other leaders, particularly John, did not acknowledge Andrew's leadership.[42] The crusaders raided nearby territory ruled by Al-Adil I for food and fodder, forcing the sultan to retreat in November 1217.[45][46] In December John besieged theAyyubid fortress onMount Tabor, joined only by Bohemond IV of Antioch.[42][47] He was unable to capture it, which "encouraged the infidel", according to the contemporaryJacques de Vitry.[42][48]
Andrew II decided to return home, leaving the crusaders' camp with Hugh I and Bohemond IV in early 1218.[49] Although military action was suspended after their departure, the crusaders restored fortifications atCaesarea andAtlit.[50] After new troops arrived from theHoly Roman Empire in April, they decided to invade Egypt.[51][52] They elected John supreme commander, giving him the right to rule the land they would conquer.[53] His leadership was primarily nominal,[54] since he could rarely impose his authority on an army of troops from many countries.[55]
The crusaders laid siege toDamietta, on the Nile, in May 1218.[56] Although they seized a strategically important tower on a nearby island on 24 August,[54][53]Al-Kamil (who had succeeded Al-Adil I in Egypt) controlled traffic on the Nile.[57] In September, reinforcements commanded byPope Honorius III's legateCardinal Pelagius (who considered himself the crusade's supreme commander) arrived from Italy.[58]
Egyptian forces attempted a surprise attack on the crusaders' camp on 9 October, but John discovered their movements.[57] He and his retinue attacked and annihilated the Egyptian advance guard, hindering the main force.[57] The crusaders built a floating fortress on the Nile near Damietta, but a storm blew it near the Egyptian camp.[57] The Egyptians seized the fortress, killing nearly all of its defenders.[57] Only two soldiers survived the attack; they were accused of cowardice, and John ordered their execution.[57] Taking advantage of the new Italian troops, Cardinal Pelagius began to intervene in strategic decisions.[59] His debates with John angered their troops.[60] The soldiers broke into the Egyptian camp on 29 August 1219 without an order, but they were soon defeated and nearly annihilated.[60] During the ensuing panic, only the cooperation of John, the Templars, the Hospitallers and the noble crusaders prevented the Egyptians from destroying their camp.[60]
In late October, Al-Kamil sent messengers to the crusaders offering to restore Jerusalem, Bethlehem and Nazareth to them if they withdrew from Egypt.[61] Although John and the secular lords were willing to accept the sultan's offer, Pelagius and the heads of themilitary orders resisted; they said that the Moslems could easily recapture the three towns.[61][62] The crusaders ultimately refused the offer.[62] Al-Kamil tried to send provisions to Damietta across their camp, but his men were captured on 3 November.[63] Two days later, the crusaders stormed into Damietta and seized the town.[64] Pelagius claimed it for the church, but he was forced to acknowledge John's right to administer it (at least temporarily) when John threatened to leave the crusaders' camp.[64] According toJohn of Joinville, John seized one-third of Damietta's spoils;[65] coins minted there during the following months bore his name.[66] Al-Mu'azzam,emir of Damascus and brother of al-Kamil, invaded the Kingdom of Jerusalem and pillaged Caesarea before the end of 1219.[67]
John's father-in-law, Leo I of Armenia, died several months before the crusaders seized Damietta. He bequeathed his kingdom to his infant daughter,Isabella.[68] John and Raymond-Roupen of Antioch (Leo's nephew) questioned the will's legality, each demanding theArmenian Kingdom of Cilicia for themselves.[66] In a February 1220 letter, Honorius III declared John to be Leo's rightful heir.[69] Saying that he wanted to assert his claim to Cilicia, John left Damietta for the Kingdom of Jerusalem around Easter 1220.[70][71] Although Al-Mu'azzam's successful campaign the previous year also pressed John to leave Egypt, Jacques de Vitry and other Fifth Crusade chroniclers wrote that he deserted the crusader army.[72]
Stephanie died shortly after John's arrival.[73] Contemporary sources accused John of causing her sudden death, claiming that he severely beat her when he heard that she tried to poison his daughterIsabella.[72] Their only son died a few weeks later, ending John's claim to Cilicia.[73] Soon after Honorius learned about the deaths of Stephanie and her son, he declared Raymond-Roupen the lawful ruler of Cilicia and threatened John with excommunication if he fought for his late wife's inheritance.[74]
John did not return to the crusaders in Egypt for several months.[75] According to a letter from the prelates in the Holy Land to Philip II of France, lack of funds kept John from leaving his kingdom.[75] Since his nephew Walter IV was approaching the age of majority, John surrendered the County of Brienne in 1221.[76] During John's absence from Egypt, Al-Kamil again offered to restore the Holy Land to the Kingdom of Jerusalem in June 1221; Pelagius refused him.[77] John returned to Egypt and rejoined the crusade on 6 July 1221 at the command of Honorius III.[78][77]
The commanders of the crusader army decided to continue the invasion of Egypt, despite (according toPhilip d'Aubigny) John's strong opposition.[78][79] The crusaders approachedMansurah, but the Egyptians imposed a blockade on their camp.[80] Outnumbered, Pelagius agreed to an eight-year truce with Al-Kamil in exchange for Damietta on 28 August.[81] John was among the crusade leaders held hostage by Al-Kamil until the crusader army withdrew from Damietta on 8 September.[81]
After the Fifth Crusade ended "in colossal and irremediable failure", John returned to his kingdom.[82][83] Merchants fromGenoa andPisa soon attacked each other in Acre, destroying a significant portion of the town.[83] According to a Genoese chronicle, John supported the Pisans and the Genoese left Acre forBeirut.[83]
John was the first king of Jerusalem to visit Europe,[84] and had decided to seek aid from the Christian powers before he returned from Egypt.[85] He also wanted to find a suitable husband for his daughter, to ensure the survival of Christian rule in the Holy Land.[83] John appointedOdo of Montbéliard as abailli to administer the Kingdom of Jerusalem in his absence.[86][87]
John left for Italy in October 1222 to attend a conference about a new crusade.[86][87] At John's request, Honorius III declared that all lands conquered during the crusade should be united with the Kingdom of Jerusalem.[88] To plan the military campaign, the pope andHoly Roman Emperor Frederick II met atFerentino in March 1223;[89] John attended the meeting.[90] He agreed to give his daughter in marriage to Frederick II after the emperor promised that he would allow John to rule the Kingdom of Jerusalem for the rest of his life.[90]
John then went to France, although Philip II was annoyed at being excluded from the decision of Isabella's marriage.[91]Matilda I, Countess of Nevers,Erard II of Chacenay, Albert,Abbot of Vauluisant and other local potentates asked John to intervene in their conflicts, indicating that he was esteemed in his homeland.[92] John attended the funeral of Philip II at theBasilica of St Denis in July;[91] Philip bequeathed more than 150,000 marks for the defence of the Holy Land.[88][91] John then visited England, attempting to mediate a peace treaty between England and France after his return to France.[93]
John made a pilgrimage toSantiago de Compostela in March 1224.[94][95] According to theLatin Chronicle of the Kings of Castile, he went to theKingdom of León to marry one of the elder daughters ofAlfonso IX of León (Sancha orDulce) because Alfonso had promised him the kingdom "along with her".[95] The marriage could jeopardize the claim of Sancha's and Dulce's half-brother,Ferdinand III of Castile, to León.[95] To protect her son's interests, Ferdinand's motherBerengaria of Castile decided to give her daughter (Berengaria of León) to John in marriage.[95] Although modern historians do not unanimously accept the chronicle's account of John's plan to marry Sancha or Dulce, they agree that the queen of France (Blanche of Castile, Berengaria of Castile's sister) played an important role in convincing John to marry her niece.[94][95] The marriage of John and Berengaria was celebrated inBurgos in May 1224.[96]
About three months later, he met Frederick II's sonHenry inMetz and visited Henry's guardian,Engelbert,Archbishop of Cologne.[97] From Germany John went to southern Italy, where he persuaded Honorius III to allow Frederick II to postpone his crusade for two years.[97] Frederick married John's daughter, Isabella (who had been crowned queen of Jerusalem), on 9 November 1225.[98] John and Frederick's relationship became tense.[99] According to a version of Ernoul's chronicle, John got into a disagreement with his new son-in-law because Frederick seduced a niece of Isabella who was her lady-in-waiting.[99] In the other version of the chronicle John often "chastised and reproved" his son-in-law, who concluded that John wanted to seize the Kingdom of Sicily for his nephew Walter IV of Brienne and tried to murder John (who fled to Rome).[99] Frederick declared that John had lost his claim to the Kingdom of Jerusalem when Isabella married him; he styled himself king of Jerusalem for the first time in December 1225.[99][100]Balian of Sidon, Simon of Maugastel, Archbishop of Tyre, and the other Jerusalemite lords who had escorted Isabella to Italy acknowledged Frederick as their lawful king.[101]
Honorius did not accept Frederick's unilateral act and continued to regard John as the rightful king of Jerusalem.[102] In an attempt to take advantage of the revivedLombard League (an alliance of northern Italian towns) against Frederick II, John went toBologna.[103] According to a version of Ernoul's chronicle, he declined an offer by the Lombard League representatives to elect himtheir king.[103] Even though this account was fabricated, John remained in Bologna for over six months.[104] The dying Honorius appointed Johnrector of aPatrimony of Saint Peter inTuscany (part of thePapal States) on 27 January 1227,[105][106] and urged Frederick II to restore him to the throne of the Kingdom of Jerusalem.[103] Honorius' successor,Gregory IX, confirmed John's position in the Papal States on 5 April[107] and ordered the citizens ofPerugia to elect him theirpodestà.[107]
Gregory excommunicated Frederick II on 29 September 1227, accusing him of breaking his oath to lead a crusade to the Holy Land;[108] the emperor had dispatched two fleets to Syria, but a plague forced them to return.[109] His wife Isabella died after giving birth to a son,Conrad, in May 1228.[110] Frederick continued to consider himself king of Jerusalem, in accordance with the precedent set by John during Isabella's minority.[110]
The imperial army under the command ofRainald of Urslingen invaded the Papal States in October 1228, beginning the so-calledWar of the Keys.[111] Although John defeated the invaders in a series of battles, it took a counter-invasion by another papal army in southern Italy to drive Rainald back toSulmona.[112] John laid a siege before returning to Perugia in early 1229 to conclude negotiations with envoys of theLatin Empire of Constantinople, who were offering him the imperial crown.[112]
TheLatin Emperor of Constantinople,Robert I, died in January 1228.[113] His brotherBaldwin II succeeded him, but a regent was needed to rule the Latin Empire since Baldwin was ten years old.[113]Ivan Asen II of Bulgaria was willing to accept the regency, but the barons of the Latin Empire suspected that he wanted to unite the Latin Empire withBulgaria.[114] They offered the imperial crown instead to John, an ally of the Holy See.[114]
After months of negotiation, John and the envoys from the Latin Empire signed a treaty in Perugia which Gregory IX confirmed on 9 April 1229.[115][116] John was elected emperor of the Latin Empire for life as senior co-ruler with Baldwin II, who married John's daughterMarie.[115][116] The treaty also prescribed that although Baldwin would rule the Latin lands in Asia Minor when he was 20 years old, he would become sole emperor only after John's death.[115][116] John also stipulated that his sons would inheritEpirus andMacedonia, but the two regions still belonged toEmperor of ThessalonicaTheodore Doukas.[115]
After signing the treaty, John returned to Sulmona.[112] According to the contemporaryMatthew Paris, he allowed his soldiers to plunder nearby monasteries to obtain money.[112] John lifted the siege of Sulmona in early 1229 to join Cardinal Pelagius, who launched a campaign againstCapua.[117] Frederick II (who had crowned himself king of Jerusalem in theChurch of the Holy Sepulchre) returned to Italy, forcing the papal troops to withdraw.[118][119]
John went to France to recruit warriors to accompany him to Constantinople.[120] Gregory IX did not proclaim John's expedition to the Latin Empire a crusade but promised papal privileges granted to crusaders to those who joined him.[120] During his stay in France, John was again an intermediary between local potentates[121] and signed a peace treaty betweenLouis IX of France andHugh X of Lusignan.[121] He returned to Italy in late 1230.[122] John's envoys signed a treaty withJacopo Tiepolo,Doge of Venice, who agreed to transport him and his retinue of 500 knights and 5,000 commoners to Constantinople in return for John's confirmation of Venetian possessions and privileges in the Latin Empire.[123] Shortly after John left for Constantinople in August, Gregory IX acknowledged Frederick II's claim to the Kingdom of Jerusalem.[124]
John was crowned emperor inHagia Sophia in autumn 1231;[125] by then, his territory was limited to Constantinople and its vicinity.[126] The Venetians urged him to wage war againstJohn III Vatatzes,Emperor of Nicaea, who supported a rebellion against their rule inCrete.[127] According toPhilippe Mouskes'Rhymed Chronicle, John could make "neither war nor peace";[125] because he did not invade theEmpire of Nicaea, most French knights who accompanied him to Constantinople returned home after his coronation.[125] To strengthen the Latin Empire's financial position,Geoffrey II of Achaea (John's most powerful vassal) gave him an annual subsidy of 30,000hyperpyra after his coronation.[126][127]
Taking advantage of John III Vatatzes' invasion ofRhodes, John launched a military expedition across theBosphorus against the Empire of Nicaea in 1233.[128][129] His three-to-four-month campaign "achieved little, or nothing"; the Latins only seizedPegai, nowBiga in Turkey.[128] With John's approval, twoFranciscan and twoDominicanfriars wanted to mediate a truce between the Latin Empire and Nicaea in 1234 but it was never signed.[130] In a letter describing their negotiations, the friars described John as a "pauper" abandoned by his mercenaries.[131]
John III Vatatzes and Ivan Asen II concluded a treaty dividing the Latin Empire in early 1235.[132] Vatatzes soon seized the last outposts of the empire inAsia Minor andGallipoli, and Asen occupied the Latin territories inThrace.[132]Constantinople was besieged in an effort to persuade the defenders to gather in one place, enabling an invasion elsewhere.[133] Although the besiegers outnumbered the defenders, John repelled all attacks on the town's walls.[134] Mouskes compared him toHector,Roland,Ogier the Dane andJudas Maccabeus in hisRhymed Chronicle, emphasizing his bravery.[134]
A Venetian fleet forced Vatatzes' naval forces to withdraw, but after the Venetians departed for home the Greeks and Bulgarians besieged Constantinople again in November 1235.[135] John sent letters to European monarchs and the pope, pleading for assistance.[135] Since the survival of the Latin Empire was in jeopardy, Gregory IX urged the crusaders to defend Constantinople instead of the Holy Land.[136] A combined naval force from Venice,Genoa,Pisa and Geoffrey II of Achaea broke through the blockade.[135] Asen soon abandoned his alliance with Vatatzes, who was forced to lift the siege in 1236.[137]
According to three 13th-century authors (Matthew Paris, Salimbene di Adam andBernard of Besse), John became a Franciscan friar before his death.[138] They agree that John's declining health contributed to his conversion, but Bernard also described a recurring vision of an old man urging the emperor to join the Franciscans.[139] Most 13th-century sources suggest that John died between 19 and 23 March 1237,[140] the only Latin emperor to die in Constantinople.[140]
According to theTales of the Minstrel of Reims, he was buried in Hagia Sophia.[141] Perry wrote that John, who died as a Franciscan friar, may have been buried in the Franciscan church dedicated to Saint Francis of Assisi which was built inGalata during his reign.[141] In a third theory, proposed byGiuseppe Gerola, a tomb decorated with the Latin Empire coat of arms inAssisi'sLower Basilica may have been built for John byWalter VI, Count of Brienne.[142]
John's first wife (Maria the Marquise, born 1191) was the only child ofIsabella I of Jerusalem and her second husband,Conrad of Montferrat.[143] Maria inherited Jerusalem from her mother in 1205.[144] John and Maria's only child,Isabella (also known as Yolanda), was born in late 1212.[29][28]
Stephanie of Armenia became John's second wife in 1214.[28] She was the only daughter ofLeo II of Armenia and his first wife, Isabelle (niece of Sibylle, the third wife ofBohemond III of Antioch).[145] Stephanie gave birth to a son in 1220, but she and her son died that year.[73]
John married his third wife,Berengaria of León, in 1224;[146] she was born around 1204 toAlfonso IX of León andBerengaria of Castile.[147][148] John and Berengaria's first child,Marie, was born in 1224.[97] Their first son,Alphonse, was born during the late 1220s.[84] Berengaria's cousin,Louis IX of France, made himGrand Chamberlain of France and he acquired theCounty of Eu in France with his marriage.[149] John's second son,Louis, was born around 1230.[84] His youngest son,John, who was born in the early 1230s, wasGrand Butler of France.[150]
John of Brienne Born:c. 1170 Died: 19–23 March 1237 | ||
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| Preceded by | Count of Brienne 1205/06–1221 | Succeeded by |
| Preceded by | King of Jerusalem 1210–1225 With:Maria andIsabella II | Succeeded by |
| Preceded by | Latin Emperor 1229–1237 With:Baldwin II | Succeeded by |
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